The problem with the Summoner in Final Fantasy XIV is the same with the class/job system in general they are not creative and they are oversimplified and boring because they designed them around the average player skill instead of the potential of the class/job which causes people to either play this game as their secondary mmo just for raiding or quit all together and play some other MMO that has more complexity ie Elder Scrolls Online and Warframe cause they are fun.

Elder Scrolls Online all skilles evolve based on use and the Pet evolves separately from the player based on how often players use their summon.